replacement
noun
uk/rɪˈpleɪsmənt/ us [ C ]
a thing or person that takes the place of something or someone else:
a replacement for sb/sth We now use LEDs as replacements for conventional light bulbs.
a permanent/temporary replacement She has agreed to take on the role of chairman until a permanent replacement is found.
He remained on the board until his replacement arrived in mid-March.
[ U ]
the act of replacing one thing or person with another:
replacement of sth Water prices will go up to pay for the replacement of a crumbling pipe network.
They make replacement parts for tractors.
The company has hired 42 replacement workers.